Embodiment
Explain the present invention below.
For improving transmission capacity and alleviating the wall thickness that own wt reduces the protective tube of land optical cable, must make this roughly the tensile strength of segmental profile wire reach 1800MPa or more than.
The tensile strength of profile wire is to be determined by the tensile strength of wire raw material wire rods and cold working amount, and when making the segmental profile wire, maximum problem is to break in the course of processing, and main points of the present invention seek not have broken string and high strength exactly.The inventor is through discovering, for example strengthens the roughly segmental profile wire 20~25 of usefulness for the land optical cable shown in the shop drawings 3 and do not break in the course of processing, and control is vital with respect to the shear zone that rolling direction has gradient.For this reason, for example the tensile strength of segmental profile wire roughly be under the situation of 1800MPa total section minification is suppressed at 85% or below, in tensile strength be under the situation of 2000MPa total section minification is suppressed at 80% or below be effective.In order to satisfy these conditions, roughly the tensile strength of segmental profile wire is under the situation of 1800MPa, the tensile strength of rolled wire must 1100MPa or more than, roughly the tensile strength of segmental profile wire is under the situation of 2000MPa, the tensile strength of rolled wire must 1200MPa or more than.
In addition, the inventor also finds, roughly the segmental profile wire is at the manufacturing processed interrupt line, is that uncombined carbon and solid solution nomadic nitrogen in steel in the strain aging that causes of solid solution in steel causes owing to heating in the cold working process causes that cementite decomposes.Therefore, in order to suppress to decompose because of the cementite that the processing heating causes, the inventor studies effective interpolation alloying element and optimum addition thereof, the Si amount that found that cementite/ferrite interface existence of adjusting in the ferrite is effective, simultaneously, by the auxiliary alloying element that adds formation carbide such as Cr, Mo, V, Ti, Nb, can further suppress the decomposition of cementite in the cold working process.
In addition, the inventor also finds, in the nitrogen in reducing steel, the nitride that utilizes Mo, Al, Ti, Nb, V, the B nitrogen of solid solution inevitably is fixed up, and can suppress the strain aging that causes because of nitrogen effectively.
Moreover, be that the roughly occasion of segmental profile wire is made in wire raw material wire rods cold working at above-mentioned steel, require these steel to have good intensity and toughness.C, the Si, Mn and the Cr that add in order to reach high-intensity purpose, when its addition increases, often form the tissue that causes cold-forming property to worsen, therefore, hope is limited to these alloying elements high strength and cold-forming property is reached in the optimum scope of equilibrated.
As mentioned above, in the present invention, in order to satisfy the requirement of high strength and good cold-forming property comprehensively, the scope of composition element is limited.The following describes the qualification foundation of these composition ranges.
C:
C content is 0.65% or when following, can not guarantee tensile strength reach 1100MPa or more than, otherwise, its content was above 1.1% o'clock, segregation increases in the continuous casting process, produce little martensite (ミ Network ロ マ Le テ Application サ イ ト), proeutectoid cementite in the rolled wire, make cold-forming property obviously worsen, thereby be defined as the content of C greater than 0.65% and be no more than 1.1%.
Si:
Si has the effect of strengthening wire rod by the solution strengthening effect.Its content can not obtain this effect 0.15% or when following, otherwise, be higher than at 1.5% o'clock, cause toughness to worsen, therefore its content is defined as 0.15~1.5%.
Especially, for reducing the outage in the special-shaped course of processing, as previously described, for the strain aging that suppresses to cause because of C in the cold working process, must suppress the decomposition and the solid solution of C in ferrite of cementite in the cold working process, for this reason, must control the existence of Si, the content that makes Si 0.5~1.5% and in pearlitic structure from cementite and ferritic interface in the 30nm scope of ferritic phase one side, satisfy the Si maximum segregation degree (the overall Si content of maximum Si concentration ÷ in the 30nm scope of ferritic phase one side) 〉=1.1 at cementite/ferrite interface from cementite and ferritic interface.Fig. 4 represents that there be the influence of situation for the processing characteristics of segmental profile wire in the Si content of segmental profile wire and Si in ferritic phase.As long as these parameters within the scope of the invention, just do not break in the course of processing.In addition, the distribution situation of the Si degree of segregation at cementite/ferrite interface for example as shown in Figure 5, can adopt AP-FIM etc. to measure, obtain.
In order to make Si in cementite/ferrite interface segregation effectively, for example can in the limit of not separating out the Coarse pearlite that causes the deterioration of Wire Drawing performance, improve the pearlitic transformation temperature, extend to the time that pearlitic transformation finishes, increase the Si amount that is discharged to ferritic phase one side when cementite is separated out as far as possible.For this reason, the air-cooled speed of cooling after the rod rolling is controlled at 1~10 ℃/second or below be effective.
Mn:
Mn can improve intensity and with the form of sulfide S be fixed, and is the hot short element that suppresses in the rod rolling process, preferably adds within the bounds of possibility.When it contains quantity not sufficient 0.2%, can not S be fixed with the form of sulfide, and the tensile strength that can not guarantee wire rod 1100MPa or more than, otherwise, its content surpasses at 1.5% o'clock, and the hardening capacity of wire rod is too high, produces little martensite sometimes, cause processing characteristics obviously to worsen, thereby Mn content is defined as 0.2~1.5%.
Cr:
Cr has and the identical element of Mn effect, can add Cr and replace a part of Mn.In addition, Cr can also refine pearlite, improves the intensity of wire rod, and in addition as mentioned above, Cr can form carbide, is the element that promotes the cementite stabilization.If Cr content surpass 1.2% and the content of Mn and Cr add up to and surpass 1.5%, will form little martensite, thereby stipulate Cr:1.2% or following and (Cr+Mn): 0.2~1.5%.
Mo, Al, V, Ti, Nb and B:
These elements can both be adjusted the grain fineness number of γ phase, and as previously described, can form carbide, nitride, are to promote the cementite stabilization and the fixing element of solid solution nitrogen.When containing Mo: less than 0.01%, Al: less than 0.002%, V: less than 0.01%, Ti: less than 0.002%, Nb: less than 0.001%, V: less than 0.001%, B: in less than 0.0005% a kind, 2 kinds or above and content add up to when being lower than 0.0005%, can not get above-mentioned effect.When containing Mo: be higher than 0.1%, Al: be higher than 0.1%, V: be higher than 0.1%, Ti: be higher than 0.1%, Nb: be higher than 0.3%, V: be higher than 0.3%, B: be higher than in 0.1% a kind, 2 kinds or above and content and add up to when being higher than 0.5%, above-mentioned effect reaches capacity, and toughness worsens, thereby in regulation Mo:0.01~0.1%, V:0.01~0.1%, Al:0.002~0.1%, Ti:0.002~0.1%, Nb:0.001~0.3%, B:0.0005~0.1% a kind, 2 kinds or above and content add up to 0.0005~0.5%.
The viewpoint that toughness is worsened from P and S, preferably their content separately 0.03% or below.In addition, consider from the angle that suppresses timeliness, wish content with N be suppressed at 0.01% or below.
The intensity of wire raw material wire rods can be determined from the speed of cooling of austenite region according to Ceq (Ceq=C+1/4Si+1/5Mn+4/13Cr) and wire rod.Ceq is high more, speed of cooling is big more, then the intensity of wire rod increases many more, and according to the inventor's research, if Ceq less than 0.80%, just can not obtain having the wire rod of 1100MPa or above intensity, thereby be under 1800MPa or the above situation in the tensile strength of profile wire, regulation Ceq 0.80% or more than.This be because: when Ceq is lower than this numerical value, in order to ensure the intensity of wire rod, the speed of cooling of wire rod must be brought up to high speed, thereby separate out inevitably for deleterious bainite of cold-forming property or martensite.
In addition, Ceq surpasses at 1.80% o'clock, and the hardening capacity of wire rod raises, even adjust the speed of cooling of wire rod, still can separate out for deleterious bainite of cold-forming property or martensite sometimes, causes processing characteristics significantly to worsen, thereby stipulates to be limited to 1.80% on it.
Be processed into the occasion of Round Steel Wire utilizing the wortle drawing, a large amount of formation fiber texture consistent with axial direction due, and when making the segmental profile wire, in general, the roll of segmental pass carries out cold rolling because use has roughly, shown in Fig. 6 (a) and 6 (b), formed and the tissue of axially parallel and the shear zone 28 that has gradient with respect to rolling direction.The pearlite interlaminar spacing of shear zone 28, carefully more much smaller than the pearlitic sheet interlayer spacing consistent with rolling direction, present processing strain concentration of local.Therefore low around the ductility ratio of shear zone 28, in the worst case, shown in Fig. 7 (a) and 7 (b), in the course of processing be that broken string 31 takes place starting point with the shear zone, in addition, the reason that it still causes the own ductility of segmental profile wire roughly to reduce, therefore must reduce its existence as far as possible, can not avoid fully under the situation of its existence, shear zone 28 and central shaft 29 angulations 30 are being unlikely become extremely low angle, this point is very important.Low angle means in the rolling process that roughly the distortion situation of segmental external diameter one side and internal diameter one side is widely different, and strain is further concentrated at shear zone, causes ductility to reduce.As shown in Figure 8, the quantity of crossing the shear zone 28 on the L section central axis 29 of segmental profile wire roughly by regulation with the per unit length central axis calculate be 20/mm or following and central shaft and shear zone angulation 30 in 10~90 ° scope, can suppress the broken string in the course of processing.
As suppressing the method that this shear zone 28 produces, for example as previously described, can reduce total section minification by raising and realize along with the intensity of segmental profile wire roughly.But for the wire rod of the line footpath 5.0mm that used in the past, the section minification when reducing cold working is limited.Wire rod for line footpath 5.0mm or following for example 4.5mm, 4.0mm, 3.0mm etc. carries out cold working, makes roughly segmental profile wire, can reduce the section minification.In addition, wire gauge is decided to be 5.0mm or following, and the amount of finish in the rod rolling process increases, and the particle diameter of γ phase becomes tiny thus, can make its refinement reach 8 grades of γ phase grain size numbers or more than, the performance improve effect than reducing total bigger ductility of section minification merely.In addition, as mentioned above, the strain aging of adjusting in Si addition and the inhibition Wire Drawing process also is effective.
Moreover, be to suppress the generation and the control angle 30 of shear zone 28, adjusting upper and lower roll Pass shape, to make roughly the speed of relative movement of segmental external diameter one side and internal diameter one side not want difference too greatly also be effective.In addition, situation shown in Figure 8, though the angle of shear zone satisfies area requirement of the present invention, the radical of shear zone is 24.3/mm of per unit length, has exceeded the scope of the present invention's regulation, thereby has broken.
As for the radical of segmental profile wire roughly, shown in Fig. 3 is circle to be divided into 6 parts roughly segmental shape, but is not limited to be divided into 6 parts, also can be that many cut apart is fan-shaped according to its purposes and working conditions.In addition, consider that from industrial angle preferably about 2~10 is fan-shaped.The optical cable of land usefulness does not require that sleeve pipe has very big resistance to pressure, but requires optical cable to have flexibility, thereby to be divided into the fan-shaped profile wire that 3 parts or above pipe for example be divided into about 4~6 parts be useful.
Embodiment 1
Land optical cable of the present invention strengthens the profile wire of usefulness, for example can be by the following stated manufacturing.The steel billet that will contain 2 tons of the substances of 0.82%C~1.0%Si~0.50%Mn~0.0045%Al (Ceq=1.23) is heated to 1050 ℃, be rolled into the line footpath of 4.5mm then, through about 7 ℃/second air-cooled, make the wire coil that tensile strength is adjusted to 2 tons of the substances of 1300MPa.Then, scale removal carries out the zinc phosphate overlay film and handles, and utilizes the wortle wire drawing to 3.0mm, and being cold-rolled to the thick cross section of 1.8mm with roll is the orthogonal wire rod.Subsequently, roughly fan-shaped in order to form, use has roughly the roll of fan-shaped pass and carries out cold rollingly, can obtain external diameter b:5.2mm, the internal diameter a:2.55mm shown in the land optical cable of Fig. 4, the profile wire 18~20 of thickness t: 1.325mm, tensile strength 1820MPa.Roughly there is not shear zone in this in the microstructure of the L section of segmental profile wire.
The intensity of the composition of wire rod shown in the table 1~table 4 (table 2~table 4 is continuous tables of table 1), Ceq, TS, the processing characteristics when wire rod is processed into segmental profile wire roughly, profile wire, form the number etc. of the profile wire of protective layer.
No.1~31st, example of the present invention, other is a comparative example.According to the present invention, can make the excellent machinability of guaranteeing wire rod, the roughly segmental profile wire that intensity surpasses the 2000MPa level.
Shown in comparative example No.32, when Ceq is lower than scope of the present invention, control total section minification in order to suppress broken string 85% or during following manufacturing, can not guarantee the intensity of 1800MPa or above roughly segmental profile wire.
Shown in comparative example No.33, when C content was higher than scope of the present invention, processing characteristics significantly worsened, and can not stably make roughly segmental profile wire.
Shown in comparative example No.34, when Si content was higher than scope of the present invention, processing characteristics significantly worsened, and can not stably make roughly segmental profile wire.
Shown in comparative example No.35, when (Mn+Cr) content was higher than scope of the present invention, processing characteristics significantly worsened, and can not stably make roughly segmental profile wire.
Shown in comparative example No.36, even Ceq within the scope of the invention, if the total content of Al, Ti, Mo, V, Nb and B is higher than scope of the present invention, processing characteristics still significantly worsens, and can not stably make roughly segmental profile wire.
More than, shown in comparative example No.32~36, as long as the composition of steel just can not stably be made high-intensity roughly segmental profile wire outside scope of the present invention.
Shown in comparative example No.37, when roughly the shear zone number in the segmental profile wire is greater than scope of the present invention, shown in comparative example No.38, the angle of above-mentioned shear zone is during less than scope of the present invention, shown in comparative example No.39, when roughly shear zone quantity in the segmental profile wire and shear zone angle are all outside scope of the present invention, frequently break in the course of processing, can not stably make roughly segmental profile wire.
Shown in comparative example No.37~39, even the composition of steel is within the scope of the invention, but as microstructure, if shear zone quantity and angle outside scope of the present invention, can not stably be made high-intensity roughly segmental profile wire.
Shown in comparative example No.40, when the Si degree of segregation at cementite/ferrite interface was higher than scope of the present invention, timeliness took place in the drawing process, processing characteristics significantly worsens, and can not stably make roughly segmental profile wire.
Can clearly be seen that by above embodiment roughly segmental profile wire of the present invention can be guaranteed very high intensity, thereby bringing into play great effect aspect weight that alleviates land optical cable and the raising weather resistance, in the very big benefit of industrial generation.
Table 1
| Test No. | Chemical ingredients (%) |
????C | ???Si | ???Mn | ???Cr | ??Mn+Cr | ??Ceq | ???Al | ????Ti | ????Mo | ????V | ????Nb | ????B | ??Al+Ti+ ??Mo+Nb+B |
Example of the present invention | ??1 | ??0.67 | ??0.22 | ??0.80 | | ??0.80 | ??0.39 | ??0.042 | | | | | | ??0.042 |
??2 | ??0.72 | ??0.20 | ??0.75 | | ??0.75 | ??0.32 | ??0.044 | | | | | | ??0.044 |
??3 | ??0.82 | ??0.21 | ??0.77 | | ??0.77 | ??1.33 | ??0.035 | | | | | | ??0.035 |
??4 | ??0.93 | ??0.19 | ??0.72 | | ??0.72 | ??1.12 | ??0.038 | | | | | | ??0.038 |
??5 | ??1.04 | ??0.22 | ??0.75 | | ??0.75 | ??1.25 | ??0.040 | | | | | | ??0.040 |
??6 | ??0.82 | ??0.22 | ??0.50 | ??0.24 | ??0.74 | ??1.06 | ??0.039 | | | | | | ??0.039 |
??7 | ??0.82 | ??0.19 | ??0.22 | ??0.72 | ??0.94 | ??1.13 | ??0.025 | | | | | | ??0.025 |
??8 | ??0.81 | ??0.19 | ??0.75 | | ??0.75 | ??1.01 | | ??0.015 | | | | | ??0.015 |
??9 | ??0.79 | ??0.22 | ??0.75 | | ??0.75 | ??1.00 | ??0.022 | ??0.020 | | | | | ??0.042 |
??10 | ??0.82 | ??0.24 | ??0.73 | | ??0.73 | ??1.03 | ??0.035 | | ??0.043 | | | | ??0.078 |
??11 | ??0.83 | ??0.24 | ??0.65 | | ??0.65 | ??1.02 | ??0.032 | | | ??0.055 | | | ??0.087 |
??12 | ??0.80 | ??0.23 | ??0.63 | | ??0.63 | ??0.98 | ??0.031 | | | | ??0.052 | | ??0.083 |
??13 | ??0.82 | ??0.21 | ??0.62 | | ??0.62 | ??1.00 | ??0.033 | | | | | ????0.043 | ??0.076 |
??14 | ??0.83 | ??0.19 | ??0.64 | | ??0.64 | ??1.01 | ??0.025 | ??0.015 | ??0.045 | ??0.055 | | | ??0.140 |
??15 | ??0.80 | ??0.22 | ??0.65 | | ??0.65 | ??0.99 | ??0.035 | | ??0.065 | | ??0.035 | | ??0.135 |
??16 | ??0.79 | ??0.23 | ??0.68 | | ??0.68 | ??0.98 | ??0.033 | | ??0.042 | | | ????0.042 | ??0.117 |
??17 | ??0.83 | ??0.25 | ??0.62 | | ??0.62 | ??1.02 | ??0.022 | ??0.015 | ??0.035 | ??0.052 | ??0.045 | ????0.004 | ??0.173 |
??18 | ??0.92 | ??0.21 | ??0.77 | | ??0.77 | ??1.13 | ??0.035 | | | | | | ??0.035 |
??19 | ??0.92 | ??0.21 | ??0.77 | | ??0.77 | ??1.13 | ??0.035 | | | | | | ??0.035 |
??20 | ??0.92 | ??0.21 | ??0.77 | | ??0.77 | ??1.13 | ??0.035 | | | | | | ??0.035 |
??21 | ??0.92 | ??0.21 | ??0.77 | | ??0.77 | ??1.13 | ??0.035 | | | | | | ??0.035 |
??22 | ??0.92 | ??0.21 | ??0.77 | | ??0.77 | ??1.13 | ??0.035 | | | | | | ??0.035 |
??23 | ??0.92 | ??0.21 | ??0.77 | | ??0.77 | ??1.13 | ??0.035 | | | | | | ??0.035 |
??24 | ??0.92 | ??0.21 | ??0.77 | | ??0.77 | ??1.13 | ??0.035 | | | | | | ??0.035 |
??25 | ??0.92 | ??0.65 | ??0.53 | | ??0.53 | ??1.19 | ??0.045 | | | | | | ??0.045 |
??26 | ??0.92 | ??1.20 | ??0.52 | | ??0.52 | ??1.32 | ??0.043 | | | | | | ??0.043 |
??27 | ??0.92 | ??1.45 | ??0.53 | | ??0.53 | ??1.39 | ??0.041 | | | | | | ??0.041 |
??28 | ??0.92 | ??1.00 | ??0.32 | ??0.21 | ??0.53 | ??1.30 | ??0.039 | | | | | | ??0.039 |
??29 | ??0.92 | ??1.00 | ??0.32 | ??0.21 | ??0.53 | ??1.30 | ??0.039 | | | | | | ??0.039 |
??30 | ??0.92 | ??1.00 | ??0.32 | ??0.21 | ??0.53 | ??1.30 | ??0.039 | | | | | | ??0.039 |
??31 | ??0.92 | ??1.00 | ??0.32 | ??0.21 | ??0.53 | ??1.30 | ??0.039 | | | | | | ??0.039 |
Table 2 (continuous table 1)
| Test No. | Chemical ingredients (%) |
?????C | ????Si | ????Mn | ????Cr | ??Mn+Cr | ????Ceq | ????Al | ????Ti | ????Mo | ????V | ????Nb | ????B | ??Al+Ti+ ??Mo+Nb+B |
Example of the present invention | ????32 | ????0.60 | ????0.25 | ????0.54 | | ????0.54 | ????0.77 | ????0.036 | | | | | | ????0.036 |
????33 | ????1.12 | ????0.25 | ????0.88 | | ????0.88 | ????1.36 | ????0.042 | | | | | | ????0.042 |
????34 | ????0.82 | ????1.64 | ????0.55 | | ????0.55 | ????1.34 | ????0.041 | | | | | | ????0.041 |
????35 | ????0.82 | ????0.25 | ????1.00 | ????0.67 | ????1.67 | ????1.29 | ????0.042 | | | | | | ????0.042 |
????36 | ????0.82 | ????1.03 | ????0.53 | | ????0.53 | ????1.18 | ????0.042 | ????0.025 | ????0.230 | ????0.160 | ????0.230 | ????0.007 | ????0.694 |
????37 | ????0.82 | ????0.25 | ????0.95 | | ????0.95 | ????1.07 | ????0.042 | | | | | | ????0.042 |
????38 | ????0.82 | ????0.22 | ????0.92 | | ????0.92 | ????1.06 | ????0.041 | | | | | | ????0.041 |
????39 | ????0.82 | ????0.24 | ????0.91 | | ????0.91 | ????1.06 | ????0.043 | | | | | | ????0.043 |
????40 | ????0.82 | ????1.01 | ????0.47 | | ????0.47 | ????1.17 | ????0.040 | | | | | | ????0.040 |
Table 3 (continuous table 1)
| Test No. | The performance of wire rod | The performance of profile wire |
Line footpath (mm) | ????TS ????(MPa) | External diameter (mm) | Internal diameter (mm) | Section minification (%) | ??TS ??(MPa) | ??EL ??(%) | Form the profile wire sum of protective layer | The Si degree of segregation at α/β interface | The number of shear zone | The angle of shear zone | Processing characteristics |
Example of the present invention | ??1 | ????6.00 | ????1131 | ????5.20 | ????2.55 | ????82.8 | ??1810 | ??3.2 | ????3 | ????- | ????13 | ????42 | Well |
??2 | ????6.00 | ????1136 | ????5.20 | ????2.55 | ????30.8 | ??1816 | ??3.1 | ????3 | ????- | ????11 | ????43 | Well |
??3 | ????5.00 | ????1298 | ????5.20 | ????2.55 | ????32.3 | ??1812 | ??3.1 | ????3 | ????- | ????7 | ????48 | Well |
??4 | ????4.50 | ????1410 | ????5.20 | ????2.55 | ????65.8 | ??1810 | ??3.2 | ????3 | ????- | ????0 | ????45 | Well |
??5 | ????4.00 | ????1552 | ????5.20 | ????2.55 | ????56.3 | ??1887 | ??3.0 | ????3 | ????- | ????0 | ????43 | Well |
??6 | ????5.00 | ????1325 | ????5.20 | ????2.55 | ????72.3 | ??1839 | ??2.9 | ????3 | ????- | ????7 | ????42 | Well |
??7 | ????5.00 | ????1399 | ????5.20 | ????2.55 | ????72.3 | ??1913 | ??2.9 | ????3 | ????- | ????8 | ????42 | Well |
??8 | ????5.50 | ????1247 | ????5.20 | ????2.55 | ????77.1 | ??1837 | ??3.2 | ????3 | ????- | ????7 | ????45 | Well |
??9 | ????5.50 | ????1262 | ????5.20 | ????2.55 | ????77.1 | ??1852 | ??3.2 | ????3 | ????- | ????8 | ????39 | Well |
??10 | ????5.00 | ????1342 | ????5.20 | ????2.55 | ????72.3 | ??1856 | ??3.3 | ????3 | ????- | ????8 | ????38 | Well |
??11 | ????5.00 | ????1345 | ????5.20 | ????2.55 | ????72.3 | ??1859 | ??3.1 | ????3 | ????- | ????7 | ????43 | Well |
??12 | ????5.00 | ????1303 | ????5.20 | ????2.55 | ????72.3 | ??1803 | ??3.2 | ????3 | ????- | ????8 | ????42 | Well |
??13 | ????5.00 | ????1309 | ????5.20 | ????2.55 | ????72.3 | ??1823 | ??3.0 | ????3 | ????- | ????8 | ????41 | Well |
??14 | ????5.00 | ????1385 | ????5.20 | ????2.55 | ????72.3 | ??1900 | ??3.1 | ????3 | ????- | ????7 | ????45 | Well |
??15 | ????5.00 | ????1359 | ????5.20 | ????2.55 | ????72.3 | ??1873 | ??3.2 | ????3 | ????- | ????8 | ????48 | Well |
??16 | ????5.00 | ????1339 | ????5.20 | ????2.55 | ????72.3 | ??1852 | ??3.0 | ????3 | ????- | ????6 | ????48 | Well |
??17 | ????5.00 | ????1432 | ????5.20 | ????2.55 | ????72.3 | ??1946 | ??2.9 | ????3 | ????- | ????8 | ????43 | Well |
??18 | ????4.50 | ????1412 | ????5.20 | ????2.55 | ????65.8 | ??1842 | ??3.1 | ????3 | ????- | ????8 | ????17 | Well |
??19 | ????4.50 | ????1412 | ????5.20 | ????2.55 | ????65.8 | ??1842 | ??3.1 | ????3 | ????- | ????8 | ????28 | Well |
??20 | ????4.50 | ????1412 | ????5.20 | ????2.55 | ????65.8 | ??1842 | ??3.1 | ????3 | ????- | ????8 | ????58 | Well |
??21 | ????4.50 | ????1412 | ????5.20 | ????2.55 | ????65.8 | ??1842 | ??3.9 | ????3 | ????- | ????8 | ????65 | Well |
??22 | ????4.50 | ????1412 | ????5.20 | ????2.55 | ????65.8 | ??1842 | ??3.1 | ????3 | ????- | ????8 | ????72 | Well |
??23 | ????4.50 | ????1412 | ????5.20 | ????2.55 | ????65.8 | ??1842 | ??3.1 | ????3 | ????- | ????3 | ????42 | Well |
??24 | ????4.50 | ????1412 | ????5.20 | ????2.55 | ????65.8 | ??1842 | ??3.1 | ????3 | ????- | ????17 | ????43 | Well |
??25 | ????5.50 | ????1422 | ????5.20 | ????2.55 | ????77.1 | ??2012 | ??2.8 | ????3 | ????1.22 | ????12 | ????36 | Well |
??26 | ????5.50 | ????1435 | ????5.20 | ????2.55 | ????77.1 | ??2025 | ??2.9 | ????3 | ????1.34 | ????4 | ????31 | Well |
??27 | ????5.50 | ????1457 | ????5.20 | ????2.55 | ????77.1 | ??2047 | ??3.1 | ????3 | ????1.56 | ????3 | ????32 | Well |
??28 | ????5.50 | ????1417 | ????5.20 | ????2.55 | ????77.1 | ??2037 | ??3.0 | ????3 | ????1.43 | ????6 | ????36 | Well |
??29 | ????4.00 | ????1418 | ????5.20 | ????2.55 | ????78.6 | ??2035 | ??3.0 | ????6 | ????1.52 | ????6 | ????31 | Well |
??30 | ????3.50 | ????1419 | ????5.20 | ????2.55 | ????79.1 | ??2045 | ??3.0 | ????3 | ????1.77 | ????7 | ????29 | Well |
??31 | ????3.00 | ????1420 | ????5.20 | ????2.55 | ????77.3 | ??2013 | ??3.0 | ????10 | ????1.83 | ????5 | ????26 | Well |
Table 4 (continuous table 1)
| Test No. | The performance of wire rod | The performance of profile wire |
Line footpath (mm) | ?TS ?(MPa) | External diameter (mm) | Internal diameter (mm) | Relative reduction in area (%) | TS (MPa) | EL (%) | Form the profile wire sum of protective layer | The Si degree of segregation at α/β interface | The number of shear zone | The angle of shear zone | Processing characteristics |
Example of the present invention | 32 | ??6.80 | ??995 | ??5.20 | ??2.55 | ??85.0 | ??1755 | ??3.2 | ????3 | ????- | ????5 | ????43 | Well |
33 | ??5.00 | ??1478 | ??5.20 | ??2.55 | ??72.3 | ??1992 | ??1.2 | ????3 | ????- | ????25 | ????43 | Break |
34 | ??5.00 | ??1452 | ??5.20 | ??2.55 | ??72.3 | ??1966 | ??1.6 | ????3 | ????- | ????7 | ????42 | Break |
35 | ??5.00 | ??1473 | ??5.20 | ??2.55 | ??72.3 | ??1987 | ??1.5 | ????3 | ????1.83 | ????9 | ????42 | Break |
36 | ??5.50 | ??1428 | ??5.20 | ??2.55 | ??77.1 | ??2018 | ??1.7 | ????3 | ????1.83 | ????7 | ????31 | Break |
37 | ??5.50 | ??1343 | ??5.20 | ??2.55 | ??77.1 | ??1934 | ??1.2 | ????3 | ????- | ????29 | ????38 | Break |
38 | ??5.50 | ??1328 | ??5.20 | ??2.55 | ??77.1 | ??1918 | ??1.5 | ????3 | ????- | ????9 | ????8 | Break |
39 | ??5.50 | ??1333 | ??5.20 | ??2.55 | ??77.1 | ??1924 | ??2.1 | ????3 | ????- | ????31 | ????6 | Break |
40 | ??5.50 | ??1443 | ??5.20 | ??2.55 | ??77.1 | ??2130 | ??0.7 | ????3 | ????1.03 | ????8 | ????33 | Break |